diff --git a/src/calibre/utils/formatter_functions.py b/src/calibre/utils/formatter_functions.py
index 91a28097c5..c933e01471 100644
--- a/src/calibre/utils/formatter_functions.py
+++ b/src/calibre/utils/formatter_functions.py
@@ -1415,7 +1415,7 @@ class BuiltinListJoin(BuiltinFormatterFunction):
                       "zero values. It can be a field like publisher that is "
                       "single-valued, effectively a one-item list. Duplicates "
                       "are removed using a case-insensitive comparison. Items are "
-                      " returned in the order they appear in the source lists. "
+                      "returned in the order they appear in the source lists. "
                       "If items on lists differ only in letter case then the last "
                       "is used. All separators can be more than one character.\n"
                       "Example:") + "\n\n" + (